Simple Inductor Simulation - LTspice versus Physics/Math./Excel

The accuracy → is ← (present)

 inductor current formulas

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another inductance meter concept

a dummy sine generator :

Op Amp version :

the x = Δf( L( f ) ) = – 2 · Δf / ( (2π) ²­ · C · f ³ )

where Δf = f(40uH) - f(42uH)

the  y = ΔL( f ) = L(42µH) – L(40µH)

and the best match for the ΔL is a non-std. average E( x , y ) = 2 · x · y / ( x + y )

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How tomeasure the inductance with a resistor , a coil and a square wave source

about
PS! note : the V_LMAX and the I_A are the max. V and I peak-values developing in the circuit at the run time
+ in the above simulation the formula does NOT account the internal resistance of the voltage source (which it should !!! (for the more accurate result))

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L - meter

src :: Cheap and easy inductance tester uses few components - EDN

test ::

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